Findings of the IPCC Fourth Assessment Report

Climate Change Science, Impacts, and Mitigation

Findings of the IPCC Fourth Assessment Report: Climate Change Science  
After assessing decades of climate data recorded everywhere from the depths of the oceans to tens of miles above Earth's surface, leading scientists from around the world have reported major advances in our understanding of climate change. Released in February 2007—six years after the prior assessment by the Intergovernmental Panel on Climate Change (IPCC)—the IPCC Fourth Assessment Report's Working Group I Summary for Policymakers synthesizes current scientific understanding of global warming and projects future climate change using the most comprehensive set of well-established global climate models.

Findings of the IPCC Fourth Assessment Report: Climate Change Impacts
The second policy-relevant report summary published in 2007 by the Intergovernmental Panel on Climate Change (IPCC) describes the impacts of global warming on society and the natural environment, as well as some of the available options for adapting. Released in April 2007—six years after the prior assessment by the IPCC—the Working Group II Summary for Policymakers is titled Climate Change 2007: Impacts, Adaptation and Vulnerability.

Findings of the IPCC Fourth Assessment Report: Climate Change Mitigation
There are a variety of strategies available today that, if implemented quickly, can rein in global warming and avoid the most severe consequences. The impact of the more ambitious of these strategies on the world economy is expected to be a fraction of a percent reduction in the annual average growth rate of global gross domestic product (GDP). These are the conclusions of the Intergovernmental Panel on Climate Change (IPCC) Working Group III Fourth Assessment Report published in May 2007.

 

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